myopia/premyopia
Conditions
Interventions
Intervention group:Wearing diffusion optics spectacle lenses
Control group:Blank control before myopia onset
Wearing the single-vision spectacle lenses for myopia
Sponsors
West China Hospital, Sichuan University
Eligibility
Sex/Gender
All
Age
6 Years to 12 Years
Inclusion criteria
Inclusion criteria: 1) Age: 6-12 years 2) -6.00D < spherical equivalent refraction (SER) <= +0.75D; Astigmatism <= 1.00D; Anisometropia <= 1.00D 3) Best-corrected visual acuity, BCVA)<= 0.1logMAR 4) No amblyopia, strabismus, or other ocular diseases and systemic diseases; 5) Having not participated in other myopia prevention and control studies, or taken other myopia prevention and control measures, including low-concentration atropine drops, peripheral defocus spectacle lenses, orthokeratology, and multifocal soft lenses within 3 months 6) Able to wear the lenses daily in accordance with the study requirements
Exclusion criteria
Exclusion criteria: 1) Failure to comply with medical advice or failure to complete follow-up visit; 2) Inability to adapt to the lenses during wear, such as dizziness, ocular discomfort, etc.;
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Diopter;Axial length; | — |
Secondary
| Measure | Time frame |
|---|---|
| Crystalline lens parameters;Retinal parameters;Choroidal parameters;visual quality questionaire; | — |
Countries
China
Contacts
Public ContactLongqian Liu
West China Hospital, Sichuan University
Outcome results
None listed